A display device includes: a side-lighting backlight source, a display panel, and a light controlling component; the side-lighting backlight source comprises a light guide plate and a plurality of light emitting devices; the light guide plate includes a plurality of first regions and a brightness of a light emitting face of each of the first regions is controllable by at least one of the light emitting devices; the light controlling component includes a plurality of second regions configured such that one of the first regions covers at least one of the second regions; the brightness of the light emitting face of each of the first regions and a light transmittance of each of the second regions are controlled according to the contrast of the image to be displayed by a corresponding region of the liquid crystal display panel.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A display device comprising: a side-lighting backlight source, a display panel at a light exit side of the side-lighting backlight source, and a light controlling component between the display panel and the side-lighting backlight source; wherein, the side-lighting backlight source comprises a light guide plate and a plurality of light emitting devices at a side of the light guide plate, the plurality of light emitting devices being configured to emit light to the light guide plate from the side of the light guide plate; the light guide plate includes a plurality of first regions and a brightness of a light emitting face of each of the first regions is controllable by at least one of the plurality of light emitting devices according to a contrast of an image to be displayed by a corresponding display region of the display panel; the light controlling component is configured to transmit light from the light guide plate to the display panel and comprises a plurality of second regions, the plurality of second regions being configured such that one of the first regions corresponds to at least one of the second regions such that light from the one of the first regions passes through the at least one of the second regions; and the light controlling component is configured to control a light transmittance of each of the second regions according to the contrast of the image to be displayed by the corresponding region of the display panel: the display device further includes: control circuits being in one-to-one correspondence to and in electrical connection with the side-lighting backlight source, the display panel and the light controlling component; and a processor electrically connected to the control circuits; wherein, the processor is configured to acquire a contrast of an image being currently displayed and a contrast of an image to be displayed by the display panel through the control circuits electrically connected to the display panel, determine the brightness of the light emitting face required for respective first region of the side-lighting backlight source and light transmittances required for respective second regions of the light controlling component according to the contrast of the image being currently displayed and the contrast of the image to be displayed, and modulate the brightness of the light emitting face of the respective first region by using the control circuit electrically connected to the side-lighting backlight source and the light transmittances of the respective second regions by the control circuit electrically connected to the light controlling component, such that the light coming from the side-lighting backlight source and passing through the light controlling component permits the display panel to display an image with a desired contrast.
2. The display device according to claim 1 , wherein the light guide plate is in a shape of rectangle and the light emitting devices are at two longer sides of the light guide plate respectively.
3. The display device according to claim 2 , wherein a light guide structure is provided on a light emitting face of the light guide plate and configured to control light to be emitted perpendicularly to the display panel.
4. The display device according to claim 2 , wherein one column of the first regions correspond to one column of the second regions and one first region of the one column of the first regions corresponds to multiple second regions of the one column of the second regions such that light from the one first region of the one column of the first regions passes through the multiple second regions of the one column of the second regions.
5. The display device according to claim 2 , wherein the light controlling component includes a plurality of pixel units and each of the second regions comprises at least one pixel unit.
6. The display device according to claim 1 , wherein a light guide structure is provided on a light emitting face of the light guide plate and configured to control light to be emitted perpendicularly to the display panel.
7. The display device according to claim 6 , wherein the light guide structure is a ridge structure extending along a shorter side of the light guide plate.
8. The display device according to claim 6 , wherein one column of the first regions correspond to one column of the second regions and one first region of the one column of the first regions corresponds to multiple second regions of the one column of the second regions such that light from the one first region of the one column of the first regions passes through the multiple second regions of the one column of the second regions.
9. The display device according to claim 6 , wherein the light controlling component includes a plurality of pixel units and each of the second regions comprises at least one pixel unit.
10. The display device according to claim 1 , wherein one column of the first regions correspond to one column of the second regions and one first region of the one column of the first regions corresponds to multiple second regions of the one column of the second regions such that light from the one first region of the one column of the first regions passes through the multiple second regions of the one column of the second regions.
11. The display device according to claim 10 , wherein the light controlling component includes a plurality of pixel units and each of the second regions comprises at least one pixel unit.
12. The display device according to claim 1 , wherein the light controlling component comprises: an array substrate and a counter substrate opposite to each other, and a light modulating layer between the array substrate and the counter substrate, the light modulating layer being configured to control a light transmittance; wherein the light controlling component comprises no light resistance layer.
13. The display device according to claim 12 , wherein the light modulating layer is a liquid crystal layer or an electrochromic layer.
14. The display device according to claim 1 , wherein the light controlling component includes a plurality of pixel units and each of the second regions comprises at least one pixel unit.
15. The display device according to claim 14 , wherein the pixel units of the light controlling component are in one-to-one correspondence to pixel units of the display panel.
16. A method of driving the display device according to claim 1 , wherein the display device includes: a side-lighting backlight source, a display panel at a light exit side of the side-lighting backlight source, and a light controlling component between the display panel and the side-lighting backlight source; wherein, the side-lighting backlight source comprises a light guide plate and a plurality of light emitting devices at a side of the light guide plate, the plurality of light emitting devices being configured to emit light to the light guide plate from the side of the light guide plate; the light guide plate includes a plurality of first regions and a brightness of a light emitting face of each of the first regions is controllable by at least one of the plurality of light emitting devices according to a contrast of an image to be displayed by a corresponding display region of the display panel; the light controlling component is configured to transmit light from the light guide plate to the display panel and comprises a plurality of second regions, the plurality of second regions being configured such that one of the first regions corresponds to at least one of the second regions such that light from the one of the first regions passes through the at least one of the second regions; and the light controlling component is configured to control a light transmittance of each of the second regions according to the contrast of the image to he displayed by the corresponding region of the display panel; the display device further includes: control circuits being in one-to-one correspondence to and in electrical connection with the side-lighting backlight source, the display panel and the light controlling component; and a processor electrically connected to the control circuits; wherein, the processor is configured to acquire a contrast of an image being currently displayed and a contrast of an image to he displayed by the display panel through the control circuits electrically connected to the display panel, determine the brightness of the light emitting face required for respective first region of the side-lighting backlight source and light transmittances required for respective second regions of the light controlling component according to the contrast of the image being currently displayed and the contrast of the image to he displayed, and modulate the brightness of the light emitting face of the respective first region by using the control circuit electrically connected to the side-lighting backlight source and the light transmittances of the respective second regions by the control circuit electrically connected to the light controlling component, such that the light coming from the side-lighting backlight source and passing through the light controlling component permits the display panel to display an image with a desired contrast; wherein the method comprises: acquiring a contrast of an image currently displayed and a contrast of an image to be displayed by the display panel; determining the brightness required for the light emitting face of respective first region of the side-lighting backlight source and light transmittances required for respective second regions of the light controlling component respectively according to the contrast of the image being currently displayed and the contrast of the image to be displayed by the display panel; and modulating the brightness of the light emitting face of the respective first region to a desired brightness and modulating the light transmittances of the respective second regions to desired light transmittances, such that the light coming from the side-lighting backlight source and passing through the light controlling component permits the display panel to display an image with a desired contrast.
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November 16, 2017
March 24, 2020
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